kevin tibbles, nbc news, glenn ellen, illinois. >>> that's our broadcast for this friday night and for this week. thank you for being here with us. i'm brian williams. my colleague, lester holt, will be here this weekend. and we want to show you what's going on outside this building because we want to remind you starting sunday, our special series "education nation" an indepth conversation about improving education in america, begins across the networks of nbc and continues on monday when we hope to see you right back here. that means they have just a few hours left to finish all that construction out on the plaza. in the meantime, have a good weekend. good night. -- captions by vitac -- www.vitac.com >>> right now at 6:00, a developing story as the judge clears the way for executions to resume in california. >> inside the blast zone. we get an indepth look at the clean up in san bruno as reports surface as a possible cause to the explosion. >> good evening. >> we begin in san bruno where people gathered for a